<template>
	<div class="login_container">
		<div class="login_box">
			<!--头像区-->
			<div class="avatar_box">
				<img src="../assets/logo.png" alt="">
			</div>
			<!--登录区-->
			<el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules"  label-width="0px" class="login_form">
				<!--用户名--> 
			  <el-form-item prop="username">
			    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
			  </el-form-item>
			  <!-- 密码 -->
			 <el-form-item prop="password">
			   <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
			 </el-form-item>
			 <!-- 按钮 -->
			 <el-form-item class="btns">
			   <el-button type="primary" @click="login">登录</el-button>
			   <el-button type="info" @click="resetLoginForm">重置</el-button>
			 </el-form-item>
			 </el-form>
		</div>
	</div>
</template>

<script>
	export default{
		data(){
			
			return{
				//这是登陆表单的数据绑定对象
				loginForm: {
					username:'admin',
					password:'123456'
				},
				//这是表单验证规则对象
				loginFormRules:{
					//验证用户名是否合法
					username:[ { required: true, message: '请输入登录名', trigger: 'blur' },
					{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur'}],
					//验证密码是否合法
					password:[
						{ required: true, message: '请输入登录密码', trigger: 'blur' },
						{ min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur'}
					]
				}
			}
		},
	methods:{
	//点击重置按钮，重置登陆表单
	resetLoginForm(){
		//console.log(this);
		this.$refs.loginFormRef.resetFields();
	},
	login(){
		this.$refs.loginFormRef.validate(async valid=>{
			if(!valid) return;
		    const {data:res}= await this.$http.post("login",this.loginForm);
			if(res.meta.status!==200) return this.$message.error('登陆失败')
			this.$message.success('登陆成功');
			//1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
			//1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问 
			console.log(res);
			window.sessionStorage.setItem("token",res.data.token);
			//1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
			// 2. 通过编程式导航跳转到后台主页，路由地址是 /home
			this.$router.push("/home");
		});
	}
  }
};
</script>

<style Lang="less">
	.login_container{
		background-color: #2b4b6b;
		height: 100%;
	}
	.login_box{
		width: 450px;
		height: 300px;
		background-color: #fff;
		border-radius: 3px;
		position: absolute;
		left: 50%;
		top: 50%;
		transform: translate(-50%,-50%);
	}
	.avatar_box{
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding: 10px;
		box-shadow: 0 0 10px #ddd;
		position: absolute;
		left: 50%;
		transform: translate(-50%,-50%);
		background-color: #fff;
	}
   .avatar_box img{
		width: 100%;
		height: 100%;
		border-radius: 50%;
		background-color: #eee;
	}
	.btns{
		display: flex;
		justify-content: flex-end;
	}
	.login_form{
		 position: absolute;
		 bottom: 0;
		 width: 100%;
		 padding: 0 20px;
		 box-sizing: border-box;
		
	}
</style>
